PSVR2 + Radeon GPU has unplayable stutter (100ms frame times) possibly EA AC bug

I should note that since the patch 1.8 I've logged dozens of hours with no major stutter or crashing issues on two other headsets, including after 1.9. Excluding the end-stage performance bug mentioned in another thread

So this is exclusively since installing the PSVR2. And it seems Nvidia users don't have this issue.

I've tried different drivers, they all have more or less the same result. Like this:

A handful of times I was able to get stutter free gameplay after changing to a different driver, which forced EAWRC to recompile shaders. But then it would just crash after sometime. I also noticed that every time I reinstalled EA anti-cheat, the stutters would return.

It's possible this maybe some odd interaction between EA anticheat and the shader cache, triggered by a new (to PC) headset?

Can anybody else reproduce this?

Ryzen 5600x

Radeon 6800xt

32GB RAM

Windows 11

PSVR2 headset